Attachment-plug.



F. 0. DE REAMBR. ATTACHMENT PLUG.

APPLICATION FILED APR. 15, 1913.

Patented Nov. 3, 1914.

Inventor Frank C. De Reamer,

Witnesses Hls fittorneu.

' attachment plugs designed burrs STATES PATENT orrion.

FRANK C. DE BEAMER, 0F SCHENECTADY, NEW YORK, ASSIGN OR TO GENERALELECTRIC COMPANY, A CORPORATION OF NEW YORK.

ATTACHMENT-PLUG.

To all whom it man concern:

Be it known that I, RANK C. DE Rename, a citizen of the United States,residingat Schenectady, county of Schenectady, State of New York, haveinvented certain new and useful Improvements inAttachmenttion. 1

My invention relates to connectors for electric conductors, and morearticularly to I or connecting the feed wires of small electricalapparatus,

Ilugs, of which the following is a specifica- .such as fan motors,heaters, portable lamps,

etc., to a service circuit by the mere insertion of the plug into asocket or receptacle such asis commonly used for the ordinaryincaudescent lamp.

Theobje'ct of my invention is to provide a durable,.simple, cheap andcompact device of this character; I

In-carryingoutmy invention, I provide a socket plug member and aseparable wire engaging member. -I provide each of these members withcontacts or contact clips adapted to engage those of'the other, and Ialso provide the socket plug member with means for making connectionbetween its clips and the contact means of the lamp socket, such as acenter contact and a contact shell to one of which each clip iselectrically connected. In the construction of the socket plug member, Iarrange within the contact shell an insulating base part or memberhaving in it openings for the contact clips, and

I employ an insulating disk part or member that separates the shell andcenter contacts and helps in securingthese contacts and the contactclips in the properrelative positions. Rapid assembling of the parts oftheplug member in the factory can be facilitated b) securing some ofthem to the insulating disk independently of the insulating'base beforeit and the insulating base are'put together. This and other advantagesare best realized when disk, shell, center contact, and contact 'clip'sall form a unitary structure with the clips seated or mounted along withthe shell and within the same on the opposite sideof the disk from thecenter contact. 4

For a fuller understanding of my invention, reference may be had to theaccom panying drawing, in which.

Figure 1 is aside elevation of the cap member; Fig. 2 is a longitudinalsection of the plug member embodyinginy invention; Fig. .3 1s alongitudinal section of the insu- Spe'cification of Letters Patent.

Application filed April 15, 1913. Serial No. 761,208.

Patented Nov. 3, 1914..

lating base which forms a. part of the attachment plug; Fig. 4c is aside elevation, partially in 'sectionfof the current carrying part ofthe plug member; and Fig. 5

1s a plan corresponding to Fig. 1.

In describingthe'parts of the attachment plug inFig. 2, I shall, forconvenience, describe them in the relations there shown, although itwill, of course, be understood that, in practice, the plug will be usedin any position.

Referring to the drawing, and first to Figs. 2, 4 and 5, 1 is a clampingsleeve provided at its lower end witl1 a flange 2 and preferably formedimmediately above the flange with a conical portion 3. A substantiallydisk-shaped insulating member T4 is seated upon the flange 2 and isprovided wlth a central opening to receive the sleeve 1 and with shallowrecesses 5 on the upper ,side thereof for a pur ose hereafter eX-plained. A screx'v-threa ed contact shell 6, closed at the bottom by atransverse portion 7, is seated upon the, member 4 and is provided witha large central opening through which the sleeve 1 extends out ofcontact therewith. The transverse portion? is pro vided with downwardlyextending protuberances which engage the openings 5 of the insulatingmember 4a and prevent relative is dis o'sed opposite to contact 10, isalsoprovi ed with a .transverse arm 13 having an opening to closelyreceive the sleeve 1. The contact clips 10 and 12 are separated byaninsulating disk 14 disposed between thetransverse arms 11 and 13 of theclips and having a contracted portion extending through the opening ofthe transverse arm 11. The contact clip 10 is thus electricallyconnected to the shell (S while the clip 12 is connected to sleeve 1.The members forming the structure shown in Fig. 4 are held together bythe clamping sleeve 1 which is provided at its upper end with a flange16 i 1 vided witha central opening 21 for the rewhich may be formed by apunch press in a well understood manner. I will, for convenience,hereafter refer to this structure as a connection unit. 1 I

An insulating base 17 is exteriorly divided by shoulders 18 and 19 intocylindrical sections of different diameters, the lower section being ofsuch a diameter as to be received in the screw-threaded shell, 6.

The base is interiorly provided with two longitudinally extendingopenings 20 which are adapted to receive the contact fingers l0 and 12.The insulating base is also proception of a'member which'secures theunit shown in Fig. 4 to the base. The bottom of the base is cored outcentrally at 22, so that the bottom of the base may pass over theinsulating disk 14, and the top of the' insulating base is cored out at23. The bottom of the base is provided with recesses 24 (shown in dottedlines in Fig. 3), within which the upwardly extending protuberances 9of" the transverse portion 7 of the shell are received. A nut 25 isseated in vided with projecting contact fingers 29 and- 30 reverselybent or curved to the fingers 10 and 12, and with which they areadaptedto engage and interlock. Conductors 31 are electrically connectedto the contact fin- .gers 29 and 30 and in turn lead to any suitableelectrical apparatus.

A plug attachment made in accordance with my invention is easilyassembled and is compact and shorter than the ordinary plug attachment.and it possesses the added advantage that the loosening of the screwwhich clamps the connector to the insulating base does not affect thecontacts;

In accordance with the provisions of the patent statutes, I havedescribed the principle of operation of my invention, together with theapparatus which I now consider to represent the best embodiment thereof;but I desire to have it understood that the apparatus shown is onlyillustrative, and that the invention can be carried out by other meanswithin the scope of my claims.

What I claim as new and desire to secure Letters Patent of the UnitedStates,

4 1. A connection unit for an attachment plug comprising an insulatingmember and a contact shell extending upward therefrom, a center contactat the lower side of 7 said insulating member, a pair of contact fingers111 said shell having overlapplng 2. A connection unit for an attachmentplug comprising an insulating member provided with a central opening, anupwardly extendin shell closed at one end seated upon sai insulatingmember and having in its end closure an opening above the opening insaid insulating member, a pair of contact clips having transverselydisposed overlapping arms provided with openings above said opening insaid insulating member, an insulating member interposed between theoverlapping portions of said clips and a conductive clamping sleevepassing through the. various openings and through said latter insulatingmembers and secured at one end to said insulating member and at-theother end to the upper one of the two clips.

3. Ina connection unit for an attachmentplug, a conductive sleeveprovided at one end with a'fiange, an insulating member .surroundingsaid sleeve and seated upon said flange, a contact shell closed at itslower end seated uponsaid insulating member, a pair of contact clipsprovided with transversely disposed overlapping arms and having openingsto receive said sleeve, an insulating member interposed between the armsof said contact clips, one of said clips being electrically connected tosaid shell and the other to said sleeve, said sleeve being secured tothe upper contact clip and the various members thus secured together. I4. In a connection unit for anattachment plug, a conductive sleeveprovided at one end with a flange, an insulating member surrounding saidsleeve and seated upon said flange, a contact shell closed at the lowerend seated upon said insulating member and provided with protuberanceswhich are received in corresponding recesses in the insulating member, apair of contact clips each provided with transversely disposed arms andhaving openings to receive said sleeve, an insulating member locatedbetween the two contact clips, one of said clipsbeing electricallyconnected to said shell and the other to said sleeve, said sleeve beingsecured to the upper contact clip and the various members thus securedtogether to form a unit.

5. In a connection unit for an attachment plug, an insulating memberprovided with a central opening, a screw-threaded metallic shell seatedthereon and closed at one end and havingan opening eoncentric with theopening in saidinsn-latingahember, a pair of contact clips h g"transtensely disposed arms whichare'provided with openings, one of theclips'having an opening larger than theopenin'g in. the insulatingmember, an insulating-disk located betwceni the two trans-,xjters'elydisposed arms and having an opening therethrough and acontracted portion which is received within the opening of the lowercontact clip, and a conductive clamping sleeve passing througlf thegvarious openings andiha/ving flanges at both ends, one of said flangesengaging insulating member and the other the: d pper" contact clip. andall the parts being tli'li's' secured together.

(3. In a separable electrical connector, the

' combination of an insulating member, a center contact and the other tosaid contact shell.

7. In a separable electrical connector, the

I combination of a contact shell having a transverse bottom portion atits lower end, an insulating disk member below said contact shell, aninsulating base in said contact shell having two openings extendinglongi' tudinally theretlwouglnsaid disk member and said base beingsecured together with said transverse portion of said shell betweenvthem, a contact clip in one of said openings secured to said disk memberindependently of said base, a center contact below said disk memberelectrically connected to said contact clip, and a contact clip in theother of said openings secured against and electrically connected tosaid transverse portion of paid contact shell also independently of saidase.

8. 'In' a separable electric connector, an insulating member, a centercontact located below the same and a contact shell closed at the lowerend extending upwardly therefrom,the transverse portionof said shellbeing provided with upwardly and downwardly extending protuberances, apair of contact clips mounted within the shell, one of the: clips beingelectrically connected to the centercontact and the other to the contactshell, and an insulating base with its lower end in saidlcontact shellhaving two openings extending longitudinally thereof which accommodatesaid contact clips, the lower face of-said insulating base and the upperface of the insulating member being provided with recesses in which theupwardly and the downwardly extending protuberancesof the contact shellare respectively engaged,

9. In an electric connector, the combination of an insulating memberhaving a center contact at its lower side, an insulating base secured tosaid member having therein a pair of longitudinally extending openings,and a screw threaded contact shell and a pair of contact clips securedto said insulating member independently of said base and extendingupwardly from said member around said base and within said openings insaid base respectively, one of said contact f clips being electricallyconnected to said contact shell and the other to said center contact.

my hand this 14th day of April, 1913.

' FRANK C. DE REAMER.

W'itnesses:

HELEN ORFORD, BENJAMIN B. HULL.

In witness whereof, I have hereunto'set v

